ABSTRACT
Wastewater pumping stations are used to lift or elevate the liquid from a lower elevation to an adequate height at which it can flow by gravity or overcome hydrostatic head. There are many pumping applications at a wastewater treatment facility. These applications include pumping of raw or treated wastewater, grit, grease and floating solids, dilute or well-thickened raw sludge or digested sludge, sludge or supernatant return, and dispensing of chemical solutions. Pumps and lift stations are also used extensively in the collection system. Because centrifugal pumps are most commonly used for raw wastewater pumping, this chapter focuses on centrifugal pumps and pump selection, design procedure for raw wastewater pumping station, operation and maintenance, and specifications of pumping equipment and pumphouse. Common terms used in pumping and pump analysis include head, capacity discharge or flow rate, and work power and efficiency. One of the most critical aspects of pump station design is the pump wet well and suctions piping.
